Paper-shell machine and mandrel for same.



J. CHESNEY.

PAPER SHELL MACHINE AND MANDREL FOR SAME.

' APPLICATION FILED SEPT-1811915. I

atented July 2,1918.

2 SHEETS-SHEET 1- M; Q o g @Q [IV VE/V TOR I AT TOR/VH5 LCHESNEY. PAPERSHELL MACHINE AND MANDREL FOR SAME.

APPLlCATlON FILED SEPT. HL 1915.

2 SHEETSSHEET 2.

0G 1 9 1 2 y 1 u u d 6 u H 6 t a P M Mandi FOWIIDEE COMP A 6 OFWILMINGTON, DELAWARE, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

PAPER-SHELL MACHINE AND MANJDREL FOE, SE.

Patented ma a, rat.

Application flled September 18, 1915. Serial No. 51,342.

To all whom it may concern:

Be it known that I, JoHN Cnrnsnnr, of Faulsboro, in the county ofGloucester, and

in the State of New Jersey, have invented a certain new and usefulImprovement in Pa per-Shell Machines and 'Mandrels for Same, and dohereby declare that the following is a full, clear, and exactdescription thereof.

My invention relates to a machine designed for making paper shells butit relates especially to a machine for producing paper shells adapted tocontain explosives.

The object of my invention is to provide a machine of this characterwhich is provided with a mandrel which may be used for making shellswith very small diameter, although the same is also adapted for theproduction of shells of large diameter. Another object of my inventionis to provide an apparatus of this kind in which air pressure is usedto' release the shells from the holes in the mandrel provided forholding the paper on.the mandrel through the action of a vacuum, appliedthrough said holes.

A further object of my invention is to .provide such an apparatus in.which a num-.

her of the moving parts previously found necessary have been omitted.

Again, another object of my invention is to provide a-mandrel in whichthe paper shell may be readily released and removed merely by the actionof air pressure and without the necessity of mechanlcally looseningorstarting the shell before its removal by air pressure;

While my invention is. capable of embodis ment in many diderent forms,for the purpose of illustration I have shown only one form thereof inthe accompanying drawings, in which I Figure 1 is a plan view of anapparatus made in accordance with my invention; Fig. 2 is a sideelevation of the same; Fig. 3 is an enlarged detail of the mandrel andcertain parts connected thereto, shown partly in section;

Fig. A is a still further enlarged detail of the same;

Fig. 5 is a vertical section of a valve designed for admittingcompressed air to the apparatus; and

, Fig. 6 is a similar view of the valve designed to apply a vacuumtherein.

In the drawings I have shown a paper shell machine comprising a frame 1having bearings 2 and 3 to support a main driving shaft 4, having at itsend tight and loose pulleys 5 and 6, to which power may be apbodyportion 15, having a central passageway 16, which communicates with asmaller passageway 17 in an extension 18, smaller in diameter than themain body portion 15, and which has a row ofholes 19 along one side andan outlet opening 20 at its end or head containing a ball valve 21cooperating with a valve seat 22 in said opening 20. A plug 23, having aperipheral recess 24: and a central operrin 25 is located in the end ofthe outlet opening 20 to retain the ball valve in place. The oppositeend of the mandrel It is arranged to fit within a stationary cylinder 26for applying air pressure and a vacuum to the mandrel. This stationarycylinder 26 is connected at its side to a pipe 27 leading to a valve 28,normally pressed upwardly against its valve seat 29 by a spring 30, andadapted to be moved away from its valve seat'by a valve rod 31 carryingthe same, which projects upwardly in proximity to the cam 32, located onthe shaft 4. From the valve 28, a pipe 33 leads to a vacuum cylinder34:, which may be provided with a vacuum in any suitablemanner. In

the end of the stationary cylinder 26 there 9 carried in bearingbrackets plied from any suitable source. On the shaft 39 which isarranged was to be operated by i a cam 10 located on the shaft 4:. Fromthe valve 36 a pipe 41 leads to a compressed air cylinder 42, which maybe supplied with compressed air in any suitable manner.- Ad:

jacent to the mandrel 14 there is located a feeding table 43 forsupplying the paper to the mandrel.

In the operation of the machine, assuming that the mandrel 14 is beingrotated by the shaft 4, a sheet of paper is fed to the mandrel Y 14 fromthe table 43 at the time when the valve 28 is open, so that theapplication of the vacuum through the holes 19 in the mandrel will holdthe sheet of paper on the same. The rotation of the mandrel graduallyrolls up the sheet of paper thereon, until the desired thickness of theshell has been obtained. At this point, any suitable apparatus not shownwill come into action so as to crimp or fold the outer edge of the paperextendlng beyond the end of the man drel 14 so as to close the end ofthe paper tube and form a shell. When this has taken place, the cam 32will move the valve 28 so as to disconnect the vacuum cylinder 34 fromthe mandrel 14 and, thereafter the shaft 4 will move the cam 40 so as toopen the valve 36 and admit compressed air into the interior of themandrel 14. The compressed air thus admitted intothe mandrel will loosenthe formed tube so as to release the same from the perforations 19,inasmuch as the compressed air passes out through said perforations 19against the interior of the shell. At .the same time, the

. compressed air will pass outwardly through the passage 20 in the endof the mandrel 14,

r so as to move the shell outwardly so as to finall remove the shellfrom the mandrel 14. he apparatus is now ready for the formation of thenext shell.

While I have described my invention above in detail, I wish it to beunderstood that many changes may be made thereinwithout departing fromthe spirit of my invention.

I claim: 4

1. A mandrel for paper shells having lat eral apertures and a headstationary with regard to the mandrel, said head having an end aperture.

2. A mandrel for paper shells having lateral apertures and a headstationary with regard to the mandrel, said head having an end apertureprovided with a check valve.

3. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture, and means for alternately applying to the mandrel compressedair and a vacuum.

4. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture provided with a check valve, and means for alternately applyingto the mandrel compressed air and a vacuum.

- 5. In combination, a mandrel for paper shells having lateralapertures, a head stationary with regard to the mandrel, said headhaving an end aperture, and means for alternately applying to themandrel compressed air and a vacuum, comprising a comressed air systemand a vacuum system, both leading to the apertures in the mandrel.

6. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture provided with a check valve, and means for alternately applyingto the mandrel compressed air and a vacuum, comprising a compressed airsystem and a vacuum system, both leading to the apertures in themandrel.

7. A mandrel for paper shells provided with lateral apertures, a headstationary with regard to the mandrel, said head having an end aperture,means to release the shell from said lateral apertures by applyingpressure through the same, and to remove the shell by applying pressurethrough the aperture in the head of the mandrel.

8. In combination, a mandrel for paper shells having lateral apertures,a head stastionary with regard to the mandrel, said head having anaperture, and a stationary cylinder connected to the mandrel havingvalve controlled connections for alternately applying to the mandrelcompressed air and a vacuum.

9. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture provided with a check valve, and a stationary cylinderconnected to the mandrel having valve controlled connections foralternately applying to the mandrel compressed air and a vacuum.

10. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture, a stationary cylinder connected to the mandrel having valvecontrolled connections for alternately applying to the mandrelcompressed air and a vacuum comprising a compressed air system andavacuum system, both leading to the apertures in the mandrel.

11. In combination, a mandrel for paper shells having lateral apertures,a head stationary with regard to the mandrel, said head having an endaperture provided with a check valve, and a stationary cylinderconnected to the mandrel having valve controlled connections foralternately applying to the mandrel compressed air and a vacuum,

tures and an end opening, and means re- Let mes tit 'sponsire to thepressure Within the mandrel In testimony that I claim the foregoinglfor-opening and, closingsaiofl end opening. I have-hereunto set my hand.

14. A. hollow mandrel. or paper she Is 7 having apertures and meansresponsive to JOHN GHESNEY' 5 pressure upon the interior surface of theWitnesses:

said mandrel for applying such pressure te EDWARD S. MYERS,

move a shell relative tothe mandrel. W. G. Cows.

